3524B and C175 Engines for Off-Highway Truck/Tractors Caterpillar

Illustration 1	g00578382
(A) Inlet valve (B) Exhaust valve

Note: The crankshaft for the front engine and the crankshaft for the rear engine are separated by 360 degrees. The camshafts for the front engine and the camshafts for the rear engine are separated by 180 degrees. For example if the No. 1 piston on the front engine is on the compression stroke then the No. 1 piston on the rear engine is on the exhaust stroke.

The following specifications are for each engine:

Number and arrangement of cylinders ... 60 degree V-12

Valves per cylinder ... 4

Displacement ... 58.5 L (3570 cu in)

Bore ... 170 mm (6.7 inch)

Stroke ... 215 mm (8.5 inch)

Compression ratio ... 15.5:1

Combustion ... Direct injection

When the crankshaft is viewed from the flywheel end the crankshaft rotates in the following direction. ... Counterclockwise

Firing order (injection sequence)

Standard rotation CCW ... 1, 12, 9, 4, 5, 8, 11, 2, 3, 10, 7, 6

Valve lash

Inlet ... 0.50 mm (0.020 inch)

Exhaust ... 1.00 mm (0.040 inch)

Note: The front end of the engine is opposite the flywheel end of the engine. The left and the right side of the engine are determined from the flywheel end. The number 1 cylinder is the front cylinder on the right side. The number 2 cylinder is the front cylinder on the left side.